Spectacles or eyeglasses



(No Model.)

J.-L.BORS-CH. SPEGTAULES OR EYEGLASSES.

'No.528,528.' P aJtentedNov.6,'1894.

UNITED STATES PATENT OFFICE.

JOHN L. BORSOH, OF PHILADELPHIA, PENNSYLVANIA.

SPECTACLES OR EYEGLASSES.

'PECIFICATION forming part of Letters Patent No. 528,528, dated November6,1894.

Application filed June 2, 1 394- Serial No. 513,289- (No model.)

To all whom it may concern:

Be it known that I, JOHN L. BORSCH, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia, Pennsylvania,have invented certain new and useful Improvements in Spectacles orEyeglasses, of which the following is a specification, reference beinghad therein to the accompanying drawings.

This improvement is designed to provide for the attachment of the metalparts to the lenses of frameless spectacles and eye glasses in such amanner as will prevent the frequent breaking of the lenses, which is agreat cause of com plaint with the users of such spectacles and eyeglasses.

Heretofore it has been the usual practice to attach the metal partsdirectly to the lenses, so that not only the clasp but the screw passingthrough it frequently comes in contact with the glass. The screw has tobe tolerably tight or it is apt to get loose and work out, and whenscrewed in tightly the changes in temperature make the glass and metalexpand and contract unequally, thereby breaking the glass. Sometimesthis breakage may be due to the clasp being held too tightly by thescrew, and sometimes by the glass being bound between the curved part ofthe clasp and the screw. To overcome these difficulties is the object ofmy present invention, which consists in the improvements hereinaftermore particularly described and then definitely claimed.

In the accompanying drawings-Figure 1 IS a front elevation on anenlarged scale of a single lens with the attached metal parts. F g. 2 isa plan on a still larger scale than Fig. 1 of a blank to be used as acushion between the clasp and the lens. Fig. 3 is a front elevation on asimilar scale showing the blank in position as a cushion; Fig. 4 shows ahorizontal section through the center of the lens and cushion and withthe clasp 1n dotted lines, on the same scale as Figs. 2 and 8. Fig. 5 isa horizontal section of a modification.

Referring now to the details of the drawings by 1etterA represents thelens and B B the metal attachmentsor clasps, B being the part carryingthe spring or bridge as the case may be, and B the handle.

0 is the blank or cushion which I prefer to make of celluloid, zyloniteor similar material, but it may be of any slightly yielding substance,as vulcanized fiber, paper, leather, rubber, &c. The cushion may beapplied in at least three different ways. In one way a blank may be cutas in Fig. 2, and then applied as a cushion, as shown in Fig.3, to thelens, when the-holes may be made by any suitable tool which will forcethat part of the blank which is over the hole into the hole in the lensas shown in Fig. 4, making two short tubes or annular ridges c which fitinside the hole in the lens. Another way, and probably the preferable,will be to make the ridges'in the cushion at the time the blank isformed, in which case the ridges will readily slip into the hole in thelens, and when the clasp B is set over the cushion as shown in dottedlines in Fig. 4, and the screw E screwed in, the clasp is firmly securedto the lens, without either the clasp or screw touching the glass sothat the lens is not in contact with the metal at all, for the body ofthe cushion prevents contact between the clasp and lens while the ridgesprevent the screw touching the lens.

In the modification shown in Fig. 5, instead of the annular ridges ortubes being formed on the cushions, short tubes 0' may be set in theholes in the lenses and the cushions with the holes already formed inthem are set on the lenses over the tubes, and the clasps then fastenedover the cushions by screws as before.

By these means perfect security is obtained against the most frequentcause of breakage of frameless eye glasses and spectacles, and thewearers of such can now be assured against such breakage.

What I claim as newis- 1. The combination with a spectacle or eyeglasslens, of a clasp B, secured by a screw arms to enter the hole in thelens, all substantially as shown and described.

In testimony whereof I aflix my signature,

in presenceof two witnesses, this 1st day of June, 189st.

JOHN L. BORSCI-I.

Witnesses:

ARCHER MCLEAN, O. MCGARRY.

